Oxytocin has two levels of functional release, each with different release conditions. Tier 1, baseline regulation — released on ordinary interaction, once the orientation scan has completed — parasympathetic activation, cortisol descent, amygdala softening. Tier 2, bonding — released on a depth-read match — parasympathetic activation, cortisol descent, amygdala softening. In a typical brain the scan completes, and basic interactions cause a Tier 1 release, as a steady drip through the day, cortisol easing each time — so the depth read is secondary and enjoyable but not paramount.
Without the sortFor ND the scan doesn't complete — and the presence of others adds to the field load rather than easing it, so ordinary interaction never triggers the drip, leaving cortisol rising with no steady counterbalance. That leaves the depth read as the only release there is: a guarded, cherished, single source. To add further tension, when a depth-read source changes or stops fitting its usual role, the scan reverts to reading them as a threat — no oxytocin, a cortisol spike, and no baseline underneath to catch the fall. Losing a source like this — a bond ending, a trusted dynamic shifting — could explain why things land far harder for the ND population than situations alone would suggest.
With Stream DiscernmentWith sorted input, the scan can reach “no threat” on ordinary interaction, so Tier 1 comes online — the baseline drip a typical brain runs by default. The depth read is no longer the only source; a depth-read source changing or ending no longer means total loss, because the baseline holds underneath it.